Cylinder earplug



FIG. 1 is a front perspective view of a cylinder earplug according to my new design,

FIG. 2 is a back perspective view thereof,

FIG. 3 is a side view thereof,

FIG. 4 is a front view thereof; and,

FIG. 5 is a back view thereof. 

CLAIM The ornamental design for a cylinder earplug, as shown and described. 